LinearRegression Class

Not originally written by Highpoint Software Systems, LLC. Written by Walt Fair, obtained
from the CodeProject site below on 5/17/2009, and used per the Code Project Open License
at the site below. Several .NET / C# semantic improvements added.
http://www.codeproject.com/KB/recipes/LinReg.aspx ( Walt's excellent article. )
http://www.codeproject.com/info/cpol10.aspx ( CodeProject Open License 1.02 )